This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The near point of a farsighted person's uncorrected eyes is 80 cm. What power contact lens should be ... (Read 43 times)

tichca

  • Hero Member
  • *****
  • Posts: 554
on: Jul 29, 2018
The near point of a farsighted person's uncorrected eyes is 80 cm. What power contact lens should be used to move the near point to 25 cm from this person's eyes?
 
  A) 2.8 diopters
  B) -2.8 diopters
  C) -4.0 diopters
  D) -4.2 diopters
  E) 4.2 diopters

Question 2

A man is nearsighted and cannot see things clearly beyond 110from his eyes. What is the focal length of the contact lenses that will enable him to see very distant objects clearly?
 
  A) 50 cm
  B) -50 cm
  C) -110 cm
  D) 110 cm
  E) -30 cm

Question 3

A nearsighted physicist cannot see things clearly beyond 90 cm from her eyes. What is the power of the contact lenses that will enable her to see very distant objects clearly?
 
  A) 1.1 diopters
  B) -1.1 diopters
  C) -1.7 diopters
  D) -2.2 diopters
  E) 2.2 diopters


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

yahahah24021

  • Sr. Member
  • ****
  • Posts: 323
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

You just saved me a lot of time. ;)

Answer to Question 3

B


tichca

  • Member
  • Posts: 554
Reply 2 on: Jul 29, 2018
Wow, this really help

Animal_Goddess

  • Member
  • Posts: 339
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Cataract extraction. The procedure involves a surgical removal of a cataract lens and its replacemen Cataract extraction. The procedure involves a surgical removal of a cataract lens and its replacemen
In the summer of 1793, a yellow fever epidemic struck Philadelphia, killing nearly 4,000. Tens of th In the summer of 1793, a yellow fever epidemic struck Philadelphia, killing nearly 4,000. Tens of th
The schematic of a variable valve timing control circuit, showing that battery power (+) is being ... The schematic of a variable valve timing control circuit, showing that battery power (+) is being ...
A dual-trace scope pattern showing both the power and the waste spark from the same coil ... A dual-trace scope pattern showing both the power and the waste spark from the same coil ...
Brushing off to finish-back. In a quiet voice ask the person to sit up with legs off the side of the ... Brushing off to finish-back. In a quiet voice ask the person to sit up with legs off the side of the ...
Development of the Eyes and Ears: External View - 28 days Embryo Development of the Eyes and Ears: External View - 28 days Embryo
Video: Endocytosis -Types and Phagocytosis

For a complete list of videos, visit our video library